全文获取类型
收费全文 | 1645篇 |
免费 | 130篇 |
国内免费 | 19篇 |
专业分类
耳鼻咽喉 | 7篇 |
儿科学 | 55篇 |
妇产科学 | 17篇 |
基础医学 | 202篇 |
口腔科学 | 27篇 |
临床医学 | 178篇 |
内科学 | 439篇 |
皮肤病学 | 28篇 |
神经病学 | 109篇 |
特种医学 | 249篇 |
外科学 | 138篇 |
综合类 | 19篇 |
预防医学 | 129篇 |
眼科学 | 6篇 |
药学 | 78篇 |
2篇 | |
肿瘤学 | 111篇 |
出版年
2023年 | 8篇 |
2022年 | 7篇 |
2021年 | 31篇 |
2020年 | 14篇 |
2019年 | 32篇 |
2018年 | 25篇 |
2017年 | 34篇 |
2016年 | 26篇 |
2015年 | 23篇 |
2014年 | 28篇 |
2013年 | 41篇 |
2012年 | 68篇 |
2011年 | 87篇 |
2010年 | 37篇 |
2009年 | 37篇 |
2008年 | 77篇 |
2007年 | 98篇 |
2006年 | 65篇 |
2005年 | 60篇 |
2004年 | 56篇 |
2003年 | 50篇 |
2002年 | 56篇 |
2001年 | 36篇 |
2000年 | 37篇 |
1999年 | 36篇 |
1998年 | 35篇 |
1997年 | 34篇 |
1996年 | 39篇 |
1995年 | 28篇 |
1994年 | 30篇 |
1993年 | 33篇 |
1992年 | 25篇 |
1991年 | 27篇 |
1990年 | 30篇 |
1989年 | 53篇 |
1988年 | 39篇 |
1987年 | 53篇 |
1986年 | 33篇 |
1985年 | 51篇 |
1984年 | 36篇 |
1983年 | 28篇 |
1982年 | 15篇 |
1981年 | 11篇 |
1980年 | 18篇 |
1979年 | 14篇 |
1978年 | 17篇 |
1977年 | 20篇 |
1976年 | 14篇 |
1975年 | 6篇 |
1974年 | 9篇 |
排序方式: 共有1794条查询结果,搜索用时 31 毫秒
1.
2.
Tori Smedal Hildegunn Lygren Kjell‐Morten Myhr Rolf Moe‐Nilssen Bente Gjelsvik Olav Gjelsvik Liv Inger Strand 《Physiotherapy research international》2006,11(2):104-116
Background and Purpose . Patients with multiple sclerosis (MS) tend to have movement difficulties, and the effect of physiotherapy for this group of patients has been subjected to limited systematic research. In the present study physiotherapy based on the Bobath concept, applied to MS patients with balance and gait problems, was evaluated. The ability of different functional tests to demonstrate change was evaluated. Method . A single‐subject experimental study design with ABAA phases was used, and two patients with relapsing–remitting MS in stable phase were treated. Tests were performed 12 times, three at each phase: A (at baseline); B (during treatment); A (immediately after treatment); and A (after two months). The key feature of treatment was facilitation of postural activity and selective control of movement. Several performance and self‐report measures and interviews were used. Results . After intervention, improved balance was shown by the Berg Balance Scale (BBS) in both patients, and improved quality of gait was indicated by the Rivermead Visual Gait Assessment (RVGA). The patients also reported improved balance and gait function in the interviews and scored their condition as ‘much improved’. Gait parameters, recorded by an electronic walkway, changed, but differently in the two patients. Among the physical performance tests the BBS and the RVGA demonstrated the highest change, while no or minimal change was demonstrated by the Rivermead Mobility Index (RMI) and Ratings of Perceived Exertion (RPE). Conclusion . The findings indicate that balance and gait can be improved after physiotherapy based on the Bobath concept, but this should be further evaluated in larger controlled trials of patients with MS. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
3.
A D Deitch V A Andreotti M A Strand L Howell R W deVere White 《The Journal of urology》1990,143(4):700-705
We describe a method to fix exfoliated bladder cells that is suitable for followup of bladder cancer patients by deoxyribonucleic acid flow cytometry. After fixation with room temperature methanol plus acetic acid (20:1, volume:volume) urine and bladder washing samples from these patients can be stored at room temperature for 3 to 7 days and then assessed reliably for the presence of aneuploidy and the percentage of hyperdiploid cells. For those with active transitional cell carcinoma diagnostic accuracy comparing fresh to fixed specimens was improved from 58 to 92% with urine and from 50 to 100% with washing samples. For patients with a history of transitional cell carcinoma who currently are free of disease the false positive rate remains unchanged after fixation. The procedure described is suitable for use in the outpatient clinic and should permit shipping of samples without refrigeration to a central flow cytometry facility for analysis. 相似文献
4.
Extrarenal Wilms tumor occurring in the inguinal canal 总被引:2,自引:0,他引:2
We report an unusual case of extrarenal Wilms tumor discovered incidentally during routine inguinal orchiopexy. The world literature and embryological implications of Wilms tumor in the inguinal canal are reviewed. 相似文献
5.
6.
Sven-Erik Strand Margareta Strandh Per Spanne 《Acta oncologica (Stockholm, Sweden)》1993,32(7):787-791
The need for direct methods of measuring the absorbed dose in vivo increases for systemic radiation therapy, and in more sophisticated methodologies developed for radioimmunotherapy. One method suggested is the use of mini-thermoluminescent dosimeters (TLD). Recent reports indicate a marked loss of signal when the dosimeters are used in vivo. We investigated the exterior surface of the dosimeters with scanning electron microscopy and the interior dosimeter volume with computed microtomography. The results show that the dosimeters initially have crystals uniformly embedded in the teflon matrix, with some of them directly exposed to the environment. After incubation in gel, holes appear in the dosimeter matrix where the crystals should have been. The computed microtomographic images show that crystals remain in the interior of the matrix, producing the remaining signal. We conclude that these dosimeters should be very carefully handled, and for practical use of mini-TLDs in vivo the dosimeters should be calibrated in equivalent milieus. An alternative solution to the problem of decreased TL efficiency, would be to coat the dosimeters with a thin layer, of Teflon, or other suitable material. 相似文献
7.
8.
V Allen PhD DW Ryan MB FRCA A Murray PhD FIPSM 《International journal of clinical practice》1994,48(3):125-129
SUMMARY Four specialised air mattresses had interface pressure measured under six body sites prone to pressure sores in 10 subjects, supine and sitting. The mattresses were the Clinirest (SSI) and FirstStep (KCI) continuous airflow mattress overlays, and Airwave (Pegasus) and Nimbus (Huntleigh) alternating pressure air mattresses. On the mattress overlays, average supine interface pressures were 2.33 kPa (scapula), 4.15 kPa (elbow), 1.94 kPa (sacrum) and 2.79 kPa (buttock), although they were higher at the occiput (7.97 kPa) and heel (11.7 kPa). The alternating pressure air mattresses had an average minimum interface pressure close to zero for three sites, rising to 4.28 kPa under the heel. Average maximum interface pressures were 8.61 kPa (occiput), 5.21 kPa (scapula), 4.90 (elbow), 4.85 kPa (sacrum), 4.61 kPa (buttock) and 13.2 kPa (heel). No accepted scientific method exists for comparing the two types of mattress. Our data suggest a clinical benefit at the occiput and heel (supine) in using an alternating pressure air mattress and a benefit in using a continuous airflow mattress overlay at other sites. 相似文献
9.
10.
Hans Rostad Anne Naalsund Randi Jacobsen Trond Eirik Strand Helge Scott Erik Heyerdahl Str?m Jarle Norstein 《European journal of cardio-thoracic surgery》2004,26(4):782-786
OBJECTIVE: The final outcome of patients with small cell lung cancer (SCLC) is poor with an overall 5-year survival rate of less than 10%. Therefore, the question of surgery in patients with a technically-operable solitary tumor has been raised. The purpose of this study was to identify the proportion of patients with operable SCLC and to assess the prognosis of different treatment strategies. For patients who were operated, we compared the resection specimens from patients with more than 5-year survival with those with shorter survival to see whether the specimens belonged to different subclasses of SCLC. METHODS: In Norway all clinical and pathologic departments submit reports on cancer patients to the Cancer Registry. The Registry also has a law-regulated authority to collect supplemental information regarding diagnosis, treatment and outcome for all cancer patients from the hospitals in charge. All reports on patients diagnosed as having SCLC in limited disease or unknown stage during the time interval 1993-1999 were reviewed. Patients with a T2-tumor, in whom a pneumonectomy would have to be performed, were classified as potentially operable. Five-year relative survival was calculated for patients diagnosed in 1993-1997. RESULTS: During the actual period 2442 individuals with SCLC were identified. The majority was treated with conventional chemotherapy or concurrent chemoradiotherapy while 38 underwent surgical therapy. Following reclassification of 697 patients reported to have limited disease or unknown stage 180 were judged to be in stage I. In addition to the 38 resected patients 14 were considered fit for surgery technically and medically while 97 were found to be potentially operable treatment modalities apart from surgery yielded a 5-year survival rate <7%. For stage I (N=96) the rate was 11.3% in conventionally treated patients compared to 44.9% for those who underwent surgical resection. By pathological review of surgical specimens a diagnosis of SCLC was confirmed in all patients treated by surgery in the groups with long and short survival. CONCLUSION: This investigation demonstrates that patients with SCLC having a peripherally located tumor should be referred to surgery, as long time survival is far better than for conventionally treated patients. 相似文献