全文获取类型
收费全文 | 9040篇 |
免费 | 534篇 |
国内免费 | 41篇 |
专业分类
耳鼻咽喉 | 90篇 |
儿科学 | 207篇 |
妇产科学 | 252篇 |
基础医学 | 1275篇 |
口腔科学 | 197篇 |
临床医学 | 941篇 |
内科学 | 2108篇 |
皮肤病学 | 100篇 |
神经病学 | 767篇 |
特种医学 | 292篇 |
外科学 | 1091篇 |
综合类 | 111篇 |
一般理论 | 13篇 |
预防医学 | 710篇 |
眼科学 | 176篇 |
药学 | 696篇 |
中国医学 | 5篇 |
肿瘤学 | 584篇 |
出版年
2023年 | 53篇 |
2022年 | 78篇 |
2021年 | 164篇 |
2020年 | 135篇 |
2019年 | 156篇 |
2018年 | 173篇 |
2017年 | 138篇 |
2016年 | 115篇 |
2015年 | 211篇 |
2014年 | 260篇 |
2013年 | 423篇 |
2012年 | 656篇 |
2011年 | 675篇 |
2010年 | 346篇 |
2009年 | 306篇 |
2008年 | 576篇 |
2007年 | 644篇 |
2006年 | 625篇 |
2005年 | 598篇 |
2004年 | 574篇 |
2003年 | 520篇 |
2002年 | 561篇 |
2001年 | 85篇 |
2000年 | 83篇 |
1999年 | 113篇 |
1998年 | 110篇 |
1997年 | 97篇 |
1996年 | 86篇 |
1995年 | 88篇 |
1994年 | 66篇 |
1993年 | 64篇 |
1992年 | 66篇 |
1991年 | 73篇 |
1990年 | 53篇 |
1989年 | 45篇 |
1988年 | 42篇 |
1987年 | 39篇 |
1986年 | 44篇 |
1985年 | 36篇 |
1984年 | 41篇 |
1983年 | 29篇 |
1982年 | 57篇 |
1981年 | 28篇 |
1980年 | 26篇 |
1979年 | 28篇 |
1978年 | 25篇 |
1977年 | 31篇 |
1976年 | 15篇 |
1975年 | 28篇 |
1973年 | 21篇 |
排序方式: 共有9615条查询结果,搜索用时 15 毫秒
51.
An open study was carried out in 17 acutely ill, newly admitted, floridly psychotic schizophrenic patients to a city hospital in New York. Penfluridol was given on a daily basis up to doses of 120 mg and patients were rated objectively by means of different psychometric evaluations; vital signs were monitored daily as were side effects.The drug was found to be a rapid acting, well-tolerated, and highly effective antipsychotic agent within the population of patients explored and within the dose range used. It was particularly effective in acutely agitated floridly paranoid schizophrenics; a statistically significant impact was achieved by 7 days and usually within 72 h after initiating treatment. The drug appears unique in that (1) its effects are realized without the untoward and usually trouble-some effects of nonspecific sedation attendant upon the use of many other neuroleptic medications, and (2) even within the relatively high doses used it produces no hypotensive effects. It is concluded that this appears to be a unique antipsychotic agent and a potentially important addition to the treatment armamentarium of both acute and chronic schizophrenic individuals.Dr. Klein was a research fellow who has since returned to the University of Munich, West Germany. Dr. Selzer was also a research fellow who is now in private practice 相似文献
52.
Mieczysław Baryluk Gerard Obłonczek Jacek Żołnowski 《Archives of orthopaedic and trauma surgery》1977,87(1):65-71
Zusammenfassung Es wurden 30 Fälle der Kniegelenksmeniskusverletzung im Kindesalter vorgestellt, die operativ behandelt waren. 20 der Behandelten wurden nach 1–12 Jahren nach dem operativen Eingriff nachuntersucht. Es wurden n die Ätiologie, der Verletzungsmechanismus und der klinische Befund besprochen. Die klinische und radiologische Nachuntersuchung ermöglichte die morphologische und funktionelle Auswertung des Kniegelenks nach der Meniskusverletzung.
Injury of the semilunar cartilages of the knee-joint in childhood
Summary In the paper, 30 patients at the age of 5 till 14 with injuries of the semilunar cartilages of the knee-joint, are presented. All the children were subjected to surgery, and 20 of them underwent same examinations performed in a delay of 1 to 12 years after they had been operated. Both etiology and the injury mechanism subjects are hadled together with the clinical pictures, specific to the age of the young patients. Basing on the clinical and X-ray examinations, the state of the morphological and functional condition of the knee of a child after semilunar cartilage had been removed, was considered and estimated.相似文献
53.
54.
McElroy MK Gerard A Powell FL Prisk GK Sentse N Holverda S West JB 《High altitude medicine & biology》2000,1(3):197-206
In a randomized, double-blind study, 24 sea-level residents drove to 3,800-m altitude in 1 day, and then slept the first night in either ambient air or 24% oxygen, and the second night in the treatment that they did not receive on the first night. Oxygen enrichment, compared with ambient air, resulted in significantly fewer apneas, and significantly less time spent in periodic breathing during the night. The increase in SaO2 between evening and morning was significantly higher after sleeping in the oxygen-enriched atmosphere, compared with ambient air. However, this significant improvement in SaO2 did not persist into mid-day. The overnight treatment did not alter the ventilatory response to hypoxia or to carbon dioxide as measured the following morning. The results suggest that the elevation in SaO2 following overnight oxygen enrichment is probably not due to a change in the control of ventilation, but possibly to differences in subclinical lung pathology. 相似文献
55.
Kunwar Bhatia Kevin P Gibbin Thomas P Nikolopoulos Gerard M O'Donoghue 《Otology & neurotology》2004,25(5):730-739
OBJECTIVE: To report the short- and long-term complications encountered in a large number of consecutive children undergoing implantation in a single center. The current study also describes the management and sequelae of each complication. STUDY DESIGN: Prospective study assessing the surgical findings and complications of deaf children undergoing implantation. SETTING: Pediatric tertiary referral center for cochlear implantation. PATIENTS: The present study includes 300 consecutive children undergoing implantation, with a mean age at implantation of 5.1 years, ranging from 1.3 to 16.9 years. Of these children, 196 (65%) had congenital deafness of unknown cause. The commonest known cause was meningitis (73 of 300 [24%]) followed by congenital cytomegalovirus infection (17 of 300 [6%]). Children have been followed up regularly after implantation, typically at yearly intervals after the first year. The mean duration of follow-up at the time of the study was 4 years (range, 0.1-14 yr). RESULTS: There were no major perioperative (within 1 d after surgery) or major early postoperative (within 1 wk after surgery) complications. In the same periods, there were 19 and 15 minor complications, respectively. These complications (e.g., eardrum perforation, hematoma, flap swelling, wound infection, temporary facial weakness) settled with conservative treatment or minor intervention. With regard to the late surgical complications (>1 wk after surgery), there were 7 major (e.g., severe flap infection requiring explantation, cholesteatoma, persistent eardrum perforation) and 14 minor complications (e.g., mild flap infection, flap swelling, hematoma). A number of complications were encountered even 14 years after the original operation, and some of them needed repeated interventions, highlighting the importance of long-term follow-up. However, most of the complications occurred very close to the surgical procedure (<1 yr). CONCLUSION: An overall rate of 2.3% for major surgical complications and an overall rate of 16% for minor surgical complications suggest that cochlear implantation is a relatively safe surgical operation in experienced centers. Most surgical complications are minor and can be managed with conservative treatment or minor surgical intervention. However, meticulous attention to surgical detail, especially handling soft tissues and leaving the posterior canal wall intact, and long-term follow-up are of paramount importance in minimizing the incidence of surgical complications. 相似文献
56.
57.
58.
59.
OBJECTIVE: Hpr6 (heme-1 domain protein/human progesterone receptor) is one of a family of proteins that are implicated in progesterone metabolism, resistance to genotoxic agents and steroid biosynthesis. Because these processes are frequently misregulated in tumors, we have examined the expression of Hpr6 in a group of clinical tumor samples and cancer cell lines. METHODS: Hpr6 expression was analyzed by Western blot in extracts from breast, cervix, colon and thyroid cell lines and in nonmalignant and adjacent tumor tissue from breast, colon and thyroid. Hpr6 localization was determined by immunofluorescence. RESULTS: Hpr6 expression is significantly elevated in breast tumors in comparison with matched nonmalignant tissue and demonstrated limited overexpression in colon and thyroid tumors. Hpr6 is strongly expressed in a panel of tumor cell lines originating from breast, thyroid and colon. Hpr6 localizes to the perinuclear region of the cell, consistent with a role in cell detoxification, signaling and/or sterol synthesis. CONCLUSIONS: Hpr6 homologues regulate cytochrome P450 proteins implicated in hormone, steroid and xenobiotic chemical metabolism. These are the first studies linking Hpr6 expression to cancer progression and cellular survival. Our results suggest that Hpr6 is an important marker for cancer progression and a potential anticancer therapeutic target. 相似文献
60.