全文获取类型
收费全文 | 811篇 |
免费 | 67篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 20篇 |
儿科学 | 48篇 |
妇产科学 | 7篇 |
基础医学 | 84篇 |
口腔科学 | 8篇 |
临床医学 | 90篇 |
内科学 | 122篇 |
皮肤病学 | 17篇 |
神经病学 | 37篇 |
特种医学 | 33篇 |
外科学 | 83篇 |
综合类 | 43篇 |
预防医学 | 68篇 |
眼科学 | 105篇 |
药学 | 47篇 |
1篇 | |
中国医学 | 1篇 |
肿瘤学 | 65篇 |
出版年
2023年 | 7篇 |
2022年 | 10篇 |
2021年 | 36篇 |
2020年 | 18篇 |
2019年 | 29篇 |
2018年 | 35篇 |
2017年 | 18篇 |
2016年 | 16篇 |
2015年 | 19篇 |
2014年 | 25篇 |
2013年 | 37篇 |
2012年 | 44篇 |
2011年 | 28篇 |
2010年 | 25篇 |
2009年 | 23篇 |
2008年 | 32篇 |
2007年 | 36篇 |
2006年 | 51篇 |
2005年 | 35篇 |
2004年 | 26篇 |
2003年 | 29篇 |
2002年 | 35篇 |
2001年 | 23篇 |
2000年 | 21篇 |
1999年 | 16篇 |
1998年 | 9篇 |
1997年 | 14篇 |
1996年 | 13篇 |
1995年 | 18篇 |
1994年 | 12篇 |
1993年 | 9篇 |
1992年 | 9篇 |
1991年 | 9篇 |
1990年 | 17篇 |
1989年 | 15篇 |
1988年 | 10篇 |
1987年 | 12篇 |
1986年 | 6篇 |
1985年 | 5篇 |
1984年 | 3篇 |
1982年 | 3篇 |
1979年 | 7篇 |
1978年 | 6篇 |
1975年 | 2篇 |
1974年 | 5篇 |
1973年 | 2篇 |
1971年 | 2篇 |
1969年 | 4篇 |
1968年 | 2篇 |
1966年 | 2篇 |
排序方式: 共有879条查询结果,搜索用时 15 毫秒
31.
Plant roots use a patterning mechanism to position lateral root branches toward available water 总被引:1,自引:0,他引:1
32.
33.
Gene Yong-Kwang Ong Nicola Ngiam Lai Peng Tham Yee Hui Mok Jacqueline SM Ong Khai Pin Lee Sashikumar Ganapathy Shu-Ling Chong Jen Heng Pek Su Yah Chew Yang Chern Lim Germac Qiaoyue Shen Jade Kua Josephine Tan Kee Chong Ng 《Singapore medical journal》2021,62(8):372
We present the 2021 Singapore Paediatric Resuscitation Guidelines. The International Liaison Committee on Resuscitation’s Pediatric Taskforce Consensus Statements on Science and Treatment Recommendations, which was published in October 2020, and the updated resuscitation guidelines from the American Heart Association and European Resuscitation Council, were reviewed and discussed by the committee. These recommendations were derived after deliberation of peer-reviewed evidence updates on paediatric resuscitation and took into consideration the local setting and clinical practice. 相似文献
34.
35.
Although previous research attests to the importance of psychological sense of community (PSOC) to individuals' well‐being, little research has examined this relationship for the four proposed dimensions of PSOC: membership, influence, integration and fulfillment of needs, and shared emotional connection (McMillan & Chavis, 1986). Further, little research has explored multiple aspects of community connectivity in the one study. The current research investigated the relationship between participants' (N=127) religiosity, PSOC, social support, and identification within a church community context and their well‐being. Results indicated that the PSOC dimensions of shared emotional connection and influence were particularly important in the prediction of well‐being in this context. Further, individuals' perception of social support mediated the relationship between PSOC and well‐being and the strength of individuals' identification as a church member enhanced the relationships of both PSOC and religiosity with well‐being. © 2009 Wiley Periodicals, Inc. 相似文献
36.
Tham TC Lichtenstein DR Vandervoort J Wong RC Slivka A Banks PA Yim HB Carr-Locke DL 《The American journal of gastroenterology》2000,95(4):956-960
OBJECTIVE: Obstruction of the main pancreatic duct from malignancy with secondary ductal hypertension may be an important contributor to pain. The aim of our study was to determine the efficacy and safety of pancreatic stent placement for patients with "obstructive" pain due to pancreatic malignancy. METHODS: Pancreatic duct stents were placed in 10 consecutive patients with malignant pancreatic duct obstruction and abdominal pain. Seven patients had "obstructive" type pain and three had chronic unremitting pain. Nine had primary pancreatic ductal adenocarcinoma and one had metastatic melanoma. There were eight women and two men. Mean age was 61 yr (range, 47-80 yr). All patients had dominant main pancreatic duct strictures with proximal dilation. Tumors were unresectable. All patients took potent analgesics before endoscopic stent therapy. Polyethylene pancreatic stents, 5- and 7-French, were successfully placed in seven patients, and self-expanding metallic stents were successfully placed in three patients. RESULTS: There were no procedure-related complications. One patient required a single repeat examination to replace a migrated stent. Seven patients (75%) experienced a reduction in pain. Analgesia was no longer required in five (50%). Three patients who did not improve had chronic pain rather than "obstructive" pain. CONCLUSIONS: Pancreatic stent placement for patients with "obstructive" pain secondary to a malignant pancreatic duct stricture appears to be safe and effective. It should be considered as a therapeutic option in these patients. It does not seem to be effective for chronic unremitting pain. 相似文献
37.
N W Schuitemaker F M Helmerhorst R T Tjon A Tham J L van Saase 《Fertility and sterility》1990,54(3):535-536
We observed a patient who had a severe anaphylactic reaction 1 hour after HSG. Allergic symptoms recurred several hours after antiallergic therapy was stopped. The initial complaints of pain and vomiting could have been due to peritoneal irritation or alternatively to an early anaphylactic reaction. Patients who are at risk should be carefully evaluated before performing HSG. These patients and those with complaints after HSG should stay under observation for 1 or 2 hours after HSG. 相似文献
38.
A Papadopoulou MO Rawashdeh GA Brown AS McNeish IW Booth 《Acta paediatrica (Oslo, Norway : 1992)》1995,84(1):79-83
The short- and long-term effects of an elemental diet in children with acute Crohn's disease were compared with those of prednisolone in historical controls. Clinical remission was induced in 25 of 30 and in 18 of 28 episodes treated for six weeks with an elemental diet and prednisolone. Patients with proximal disease had longer remission after treatment with an elemental diet (p < 0.05) than did patients with colonic disease after treatment with prednisolone (p < 0.01). Disease activity index score improved in both groups compared with the pretreatment scores (p < 0.05). However, the improvement in the elemental diet group was significantly better than in the prednisolone group (p < 0.001). Changes in linear growth were better after treatment with an elemental diet compared with steroids (p < 0.001). Serum albumin and haematocrit concentrations all improved significantly in the children treated with an elemental diet (p < 0.001) but not in those treated with steroids. Thus an elemental diet was better than prednisolone in proximal disease and confirmed improved growth and nutritional status. 相似文献
39.
In a double blind study, 40 infants with cows' milk intolerance of various causes were randomised to receive a nutritionally complete formula in which nitrogen was supplied either as whey hydrolysate or amino acids. The median age of infants was 10 weeks (range 36 weeks' gestation to 108 weeks' postnatal age). After a median follow up period of 25 weeks there was no significant difference in dietary intake between the formulas. Twenty four weeks after entry, weight and weight for length improved equally on both formulas. Plasma albumin improved significantly on the hydrolysed whey formula but not in the amino acid group. Both milks were palatable and normal intakes of formula were maintained. Biochemical and haematological indices remained within normal limits. There was no difference in stool frequency and vomiting between the two formulas. Two infants developed a probable allergic colitis while receiving hydrolysed whey. Amino acid formula may have a role in the management of atopic infants with severe cows' milk intolerance who have already reacted to whey or casein hydrolysate formula. 相似文献
40.
Corneal graft rejection: recent updates 总被引:3,自引:0,他引:3