全文获取类型
收费全文 | 3560篇 |
免费 | 222篇 |
国内免费 | 46篇 |
专业分类
耳鼻咽喉 | 67篇 |
儿科学 | 87篇 |
妇产科学 | 111篇 |
基础医学 | 446篇 |
口腔科学 | 111篇 |
临床医学 | 285篇 |
内科学 | 609篇 |
皮肤病学 | 75篇 |
神经病学 | 204篇 |
特种医学 | 155篇 |
外国民族医学 | 3篇 |
外科学 | 582篇 |
综合类 | 152篇 |
一般理论 | 3篇 |
预防医学 | 188篇 |
眼科学 | 170篇 |
药学 | 382篇 |
中国医学 | 16篇 |
肿瘤学 | 182篇 |
出版年
2023年 | 41篇 |
2022年 | 105篇 |
2021年 | 190篇 |
2020年 | 87篇 |
2019年 | 105篇 |
2018年 | 172篇 |
2017年 | 81篇 |
2016年 | 109篇 |
2015年 | 121篇 |
2014年 | 129篇 |
2013年 | 171篇 |
2012年 | 226篇 |
2011年 | 235篇 |
2010年 | 137篇 |
2009年 | 135篇 |
2008年 | 170篇 |
2007年 | 170篇 |
2006年 | 166篇 |
2005年 | 138篇 |
2004年 | 147篇 |
2003年 | 137篇 |
2002年 | 125篇 |
2001年 | 60篇 |
2000年 | 60篇 |
1999年 | 54篇 |
1998年 | 35篇 |
1997年 | 32篇 |
1996年 | 29篇 |
1995年 | 32篇 |
1994年 | 18篇 |
1993年 | 10篇 |
1992年 | 43篇 |
1991年 | 35篇 |
1990年 | 28篇 |
1989年 | 36篇 |
1988年 | 35篇 |
1987年 | 19篇 |
1986年 | 14篇 |
1985年 | 16篇 |
1984年 | 12篇 |
1983年 | 9篇 |
1982年 | 13篇 |
1981年 | 12篇 |
1980年 | 13篇 |
1979年 | 10篇 |
1978年 | 13篇 |
1977年 | 14篇 |
1976年 | 8篇 |
1975年 | 13篇 |
1974年 | 12篇 |
排序方式: 共有3828条查询结果,搜索用时 15 毫秒
41.
From the whole plants of Euphorbia petiolata, four new ingenane-type diterpenoids, 3,20-O-diacetylingenol 5-O-(2' E,4' Z)-tetradecadienoate (1), 5,20-O-diacetylingenol 3- O-(2' E,4' Z)-tetradecadienoate (2), ingenol 3-O-(2' E,4' Z)-tetradecadienoate (3), and 5,20-O-isopropylidenylingenol 3-O-(2' E,4' Z)-tetradecadienoate (4) were isolated. Their structures were elucidated by spectroscopic methods and chemical transformations. 相似文献
42.
J M Hardy A Tadlaoui J M Wirotius M Saleh 《The Orthopedic clinics of North America》1991,22(4):663-675
With the Sequoia fixator, lengthenings can be achieved based on the clinical facts of the case. The device is a modular apparatus that can perform corrections in several planes, and, if necessary, in a septic environment. In our opinion, a "lengthener surgeon" is one who can foresee problems and take appropriate steps to prevent them. Likewise, the surgeon must act as the coordinator of an entire team. A successful lengthening is 5% surgery and 95% postoperative nursing and physiotherapy care. In the future, a number of changes will simplify postoperative management: 1. Composite carbon rings will make the frames radiolucent and one third lighter than those made of stainless steel. Automatic tensioners will help maintain steady tension on the wires. 2. Digital analysis of the callus will provide norms of consolidation, allowing faster fixator removal and conversion to an orthosis. 3. Incorporating the foot in the frame to overcome equinus will eliminate the need for tenotomy. We believe that monolateral and ring fixators can work together in certain locations. That is why we proposed, at the 18th Societé Internationale de Chirurgie Orthopédique et Traumatologique meeting, a combined monolateral-ring construct that can be used for lengthening throughout the proximal femoral metaphysis. 相似文献
43.
44.
45.
46.
Saleh A. Bawazir 《The International journal of pharmacy practice》2004,12(2):83-89
Objective The purpose of this study was to determine consumer attitudes towards community pharmacy and their preferences for the introduction of new services. Methods A self‐completion questionnaire was developed and 1,144 consumers in 55 community pharmacies were invited to complete it. The questionnaire covered consumers' choice of pharmacy; their perceptions of, and actual interactions with, community pharmacists; advice from pharmacists about general health and prescribed medicines; and privacy in the pharmacy. Respondents were asked for their views about five possible new services. Setting The study was based in community pharmacies in Riyadh City, Saudi Arabia. Key findings The response rate was 79.6%. Fifty‐nine per cent of respondents often or sometimes visited a particular pharmacy. One‐quarter of respondents perceived community pharmacists as having a good balance between health and business matters, while 56.1% thought pharmacists were more concerned with the business. The majority of respondents (69.7%) said they felt comfortable asking the pharmacist for advice. Just under half (44.8%) felt that pharmacists allowed them enough time to discuss their problem fully and listened well. In addition, 58.5% of respondents indicated that their pharmacists showed sensitivity to privacy by speaking more quietly across the counter. In 14.4% of situations pharmacists were reported to use a private area within the pharmacy when discussing personal or private matters. Most respondents (65.2%) indicated that their pharmacist was willing to discuss their health problems and tried to understand their feelings. Consumers' priorities for new services were: monitoring blood pressure; measuring weight, height and temperature; monitoring blood sugar; and monitoring cholesterol. Conclusion This study showed that most pharmacy customers feel comfortable seeking advice from their pharmacist. Although many pharmacists were reported to show sensitivity to a possible lack of privacy in the pharmacy, few respondents reported that their pharmacy had a private area for discussion. Customers' views on possible new services were generally positive, with the exception of patient medication records. 相似文献
47.
This is a prospective study evaluating 28 patients who were suspected to have ectopic pregnancy. Frozen section Pipelle endometrial biopsy was performed as an outpatient procedure to look for the presence of chorionic villi in the specimen. The sensitivity of the frozen section endometrial biopsy in detecting the presence of chorionic villi was 13.3% and the specificity was 100%. The positive predictive value was 100% and the negative predictive value was 50%. We concluded that frozen section endometrial biopsy was not helpful in predicting intrauterine gestational process; therefore, it has a limited application in patients suspected to have ectopic pregnancy. 相似文献
48.
Rohland BM Saleh SS Rohrer JE Romitti PA 《Psychiatric services (Washington, D.C.)》2000,51(5):672-674
Sixty-seven residents of a rural Midwestern state were surveyed by telephone to determine which factors influence their willingness to receive mental health services through live, two-way audio and video transmission. Two-thirds of the survey respondents were willing to participate in telepsychiatry. Many expressed reluctance, however. They were concerned about maintaining confidentiality, and they perceived telepsychiatry as impersonal. Medicare enrollees and older survey respondents were less willing than younger respondents to endorse the use of telemedicine. 相似文献
49.
Phase I/IIa study of cetuximab with gemcitabine plus carboplatin in patients with chemotherapy-naive advanced non-small-cell lung cancer. 总被引:2,自引:0,他引:2
Francisco Robert George Blumenschein Roy S Herbst Frank V Fossella Jennifer Tseng Mansoor N Saleh Michael Needle 《Journal of clinical oncology》2005,23(36):9089-9096
PURPOSE: This multicenter, open-label, phase I/IIa study was undertaken to establish the safety/toxicity profile of cetuximab in combination with gemcitabine and carboplatin in patients with chemotherapy-na?ve, epidermal growth factor receptor-positive, stage IV non-small-cell lung cancer. Secondary objectives were to gather preliminary evidence of efficacy including tumor response rate, time to progression, and overall survival. PATIENTS AND METHODS: Thirty-five patients received a total of 264 3-week cycles of treatment with cetuximab, carboplatin, and gemcitabine. An initial dose of cetuximab 400 mg/m2 intravenously was administered the first week, followed by weekly doses of 250 mg/m2. Carboplatin (area under the curve = 5, day 1) and gemcitabine 1,000 mg/m2 on days 1 and 8 were administered every 3 weeks. Patients were evaluated for tumor response after every two cycles of therapy. RESULTS: The most frequently reported adverse events related to cetuximab included an acne-like rash (88.6%), dry skin (34.3%), asthenia and skin disorders (31.4%), mucositis/stomatitis (25.7%), fever/chills (20%), and nausea/vomiting (17.1%). The majority of these toxicities were mild to moderate. One patient withdrew from the study because of a grade 3 allergic reaction. Myelosuppression was the most frequently observed toxicity related to chemotherapy. Responses among 35 assessable patients included 10 partial responses (28.6%). Twenty-one patients had stable disease. The median time to progression was 165 days, and the median overall survival was 310 days. CONCLUSION: The combination of cetuximab, carboplatin, and gemcitabine was well tolerated with an acceptable toxicity profile. Most grade 3 adverse events were attributable to chemotherapy. The response rate and median survival are encouraging and warrant additional investigation. 相似文献
50.
Objective: To assess the pharmaceutical sector to know whether people have access to essential medicines.
Setting: The study was conducted in 20 public health clinics, five public district drug stores and 20 private retail pharmacies selected
randomly in five different areas randomly selected (four states and a federal territory).
Method: The methodology used was adopted from the World Health Organization study protocol. The degree of attainment of the strategic
pharmaceutical objectives of improved access is measured by a list of tested indicators. Access is measured in terms of the
availability and affordability of essential medicines, especially to the poor and in the public sector. The first survey in
the public health clinics and public district drug stores gathered information about current availability of essential medicines,
prevalence of stock-outs and affordability of treatment (except drug stores). The second survey assessed affordability of
treatment in public health clinics and private retail pharmacies.
Main Outcome Measure Availability, stock-out duration, percent of medicines dispensed, accessibility and affordability of key medicines.
Results The average availability of key medicines in the public health clinics for the country was 95.4%. The average stock-out duration
of key medicines was 6.5 days. However, average availability of key medicines in the public district drug stores was 89.2%;
with an average stock-out duration of 32.4 days. Medicines prescribed were 100% dispensed to the patients. Average affordability
for public health clinics was 1.5 weeks salary and for the private pharmacies, 3.7 weeks salary.
Conclusions: The present pharmaceutical situation in the context of essential medicines list implementation reflected that the majority
of the population in Malaysia had access to affordable essential medicines. If medicines need to be obtained from the private
sector, they are hardly affordable. Although the average availability of essential medicines in Malaysia was high being more
than 95.0%, in certain areas in Sabah availability was less than 80.0% and still a problem. 相似文献